Fuse and mounting



July 29, 1924.

- E. H. JACOBS FUVSE AND MOUNTING 3 Sheets-Sheet. 1

Filed may 22, 1919.

Clftkormggs July 29, 1924.

E.- H. JACOBS Fuss AND MOUNTING Filed may 22, 1919 s Sheets-Sheet. 2

mmr Emmi; H. Jacqlm worm/exp July 29. 1924. 1,503,266

E. H-. JACOBS FUSE AND MOUNTING Filed May 22, 1919' s Sheets-Sheet 3Patented July 29, 1924.

UNITED STATES BATENT OFFICE.

ERNEST H. "IACOBS, OF CHICAGO, ILLINOIS, ,ASSIGNOR TO ELECTRICALENGINEERS EQUIPMENT COMPANY, OF CHICAGO, ILLINOIS, A .CORIfORATIONROFILLINOIS.

FUSE AND MOUNTING.

Application filed Ka 22, 1919. Serial No. 298,905.

To all whom it may concern:

Be it known that I, ERNEST H. JAcoBs, a

citizen ,of the United States, residing 111;

improved fuse and mounting of such character that the fuse may bereadily inserted and withdrawn from the mounting and which fuse is soconstructed that it takes the place of a disconnecting switch.

The fuse which I have illustrated in the accompanying drawings is of theexpulsion type but it is to be understood that the construction which Ihave devised is useful not only for 'fuses of the expulsion type, but ofany other type.

In order to secure suitable contact between the terminal of the fuse andthe terminals of the circuit, it is customary to provide suitablecontacts such as ferrules or blades mounted on the barrel or casing ofthe fuse and to have these engage suitable spring jaws forming thestationary circuit terminals.

When the contacts are of relatively large size as where considerablecurrent must be carried,- and particularly where relatively high tensioncurrent is involved, the matter of inserting the fuse into the terminalsof the circuit presents a very considerable practical difliculty. Asitfis necessarytd handle a fuse with some kind'fof implement having ahigh insulation value, and as the frictional resistance of the.terminals is fairly high, taking out or inserting a fuse is awkward andlaborious. Particularly is it true where the fuse is fairly long orheavy.

According to my invention I provide a pair of trunnions at one end ofthe fuse. These trunnions are formed upon the sleeve or barrel andare-preferably integral with the lower ferrule. The trunnions areadapted to seat in suitable bearings which preferably are split topermit insertion of trical contact therewith. In some embodiments of myinvention I 'arran e the fuse member or some partconnecte with thetrunnions to force the split bearings open upon rotation of the fuseabout the trunnions in the bearings. Thesplit bearings preferably havespring means so arranged that the movable portion of the bearings snapsinto and out of position automatically.

For convenience in handling the fuse is provided at each end with a ringin such position that the ring which is required is brought intoposition at the corres ondihg stage of insertion or withdrawal. 0 applyor withdraw the fuse I employ a stick or hook such as is well known foruse in connection with the operation of disconnecting switches. 2

I believe I am thefirst to provide a fuse which is adapted to be thusmanipulated by the usual switch stick.

In order to acquaint those skilled in the artwith the nature and themanner of practicing my invention I shall now describe the same inconnection with the accompanying drawings which illustrate severalembodiments of the same.

Figure 1 is a side elevational view of a constructionv of fuse andmounting which embodies my invention;-

F i re2 is a similar side elevational view on a arger scale, showing amodification;

Figure 3 is a plan view of the same;

Figure 4 is a cross sectional view taken on the line 4-4 of Figure 2;

Figure 5 is a fragmentary sectional view taken on the line55 of Figure4;

Figure 6 is a side elevational view of a modification;

Figure 7 is a fragmentary side elevatio showing the lower terminal andbearing in rubber, glass or the like, having ferrules 3 and 4 screwthreaded upon the upper and lower ends respectively of the tube orsleeve. The upper sleeve 3 is provided at its lower end with an integralpettiooat member 5 which serves to keep the adjacent part of the .sleevedry. and thus prevent any film of moisture which might tend to form. .Aring on lug 6 is formed integral with the petticoat member 5, this ringhaving a suitable opening or eye 7 which when the fuse is in theposition shown in Figure 2, pro

jects forward in the most convenient position to be engaged by the stickor operating implement 8 shown in Figure 9.

The lower ferrule 4 similarly has an integral ring or lug 9 which hasthe eye 10- also adapted on proper occasion to be, en-

gaged by the stick 8.

The ferrule 3-has its outer end closed.

' seen that the washer-13 is suitably cut away imorder that it will notproject beyond the edges of the ferrule 3, but at the same time it willshield the opening 15 in the upper wall 11 of the ferrule 3.

Atits lower end the fuse wire 12 is clamped between the cap screw 16.and a suitable lug 17 formed on the lower ferrule 4. The ferrule 4 isopen at its outer end so that the fuse wire 12 upon being blown maydis-.

charge the heated gases and vapors out of the lower end of thesleeve ortube 2, thus extinguishing the are which would otherwise tend tomaintain itself between the terminals. The lower ferrule 4 is providedwith the trunnions 18, which extend laterally in such a manner as tocause the fuse when swung about the axis of these'trunnions to move insubstantially a vertical plane. These trunnions 18 are preferably formedintegral with the lowersleeve'4 and are machined off to give a goodcylindrical bearing surface, which will form the required contact withthe terminal to conduct the current passing thru the fuse. The trunnions18 are mounted in a split bearing formed of the stationary portion 1 9and the movable portion 20. The stationary portion 19 is formed in theshape of abracket havingthe cylindrical seat 21 adapted to fit thecontour of thetrunnion 18. This bracket has the base portion 22, whichis mounted upon a suitable support, preferably insulating the same fromthe surrounding conductor. The stationary member 19 is duplicated sothat both trunnions are given proper support, but it is to beunderplified. The movable bearing portions 20 are connected togetherbythe cross bar 23 shaped members are hinged or pivoted together on theshaft 25.

The movable bearing portions 20 are .provided with rearwardly. extendinglever arms 26 whichengagesprings 27 seated in suitable sockets 28. Theouter ends of the bearing portions 19 and 20 on each side are ,fiaredoutwardly both in order to guide the trunnions into place between thebearing portions and also to guide the ferrule 4 be tween the bearingportions on opposite sides of the device. The upper or movable bearingportions 20 are provided with seats or sockets'29, which fit closelyabout the trunnions 18 to secure as large an area of contact aspossible. r

The upper ferrule 3 is adapted to engage a spring contact terminalformed of two similar fiat springs 30 and 31 which are flared outwardlyat their outer ends to guide the ferrule 3 between them, and which areprovided with curved portions 32 for forming a large area of contactbetween the springs and the ferrule 3. J At their inner ends' thesprings 30 and 31 'are clamped by means of the bolts 33 against a lug-orterminal bracket 34 which is formed integralwith'the base 35; Thelug 34has a finger 36 which extends up and over'the ferrule 3 when the fuse 1is in position. 7

As shown in Figure 1 the terminals for the fuse 1 are mounted by meansof the'terminal bases 35 and 22'u'pon suitable angle brackets.37 and 38.These angle brackets are supported in'this case uponthe tops of theinclined insulators 39 and 40, these insulators being of any known orpreferred type.

The character of theinsulating mounting is not of the essence of thepresent invention and is shown merely to illustrate the usual manner inWhlOh fuses of this. type are mounted and to make clear the conditionsof operation encountered.-

The operation of the device shown in Figures 1 to 3-inclusive is asfollows: To, re-

move the fuse from the position shown in Figure 1 the finger 42-of thestick or implement 8 is inserted in the eye' 7 at the upper end of thefuse'and this end of the fuse is pulled outwardly to disengage theferrule 3 from the spring jaws 303l. The fuse 1 is then swung down intothe dotted line position shown in Figure 1 and the pin 42 of the stick 8is withdrawn.v The rotation of the fuse 1 about the trunnions 18 bringsthe ring 9 from the position at the rear to the positional: the front asindicated in the fuse 1 is swung about the trunnions 18 into dotted lineposition on Figure 1 and on Figthe position shown in Figure 7. In doingure 2. The operator then inserts the pin 42 so the lower end of theferrule 4 engages in the ring 9 and withdraws the trunnions the crossmember 50, swinging the movable 18 from the spring jaws 19 and 20." jaws46 about the shaft 51 until the spring To facilitate the withdrawal of'the trun- 48 presses on the opposite side of center or nions18 from thejaws 19 and 20 I have proin such a direction as to tend to swing thevided the small cams 43 on the trunnions movable arms 46 upwardly. Asuitable stop and have provided co-operating projections 56 is providedfor limiting the motion of 44 on the movable jaws 20. Movement of thesearms 46 to such a position where the fuse to the position indicated indotted lines arm may again be forced downwardly upon in Figure 2 willrotate cam 43 into the posi proper operation of the device. tion shownin Figure 5 engaging projections When the parts are in the positionshown 44 and raising jaws 20. This permits the in Figure7 the pin maythen be inserted trunnions 18 to be withdrawn more readily, in the eye10 and the fuse may be lifted but it is to. be understood that this is amodifr m the stationaryj aw .47 without any difiification which does notdepart, from the culty. When it is deslred'to insert the fusefundamental idea shown in Figures 1, 2 1n the jaws the fuse is firsthung upon the and 3. u stationary jaws 47 as shown in Figure 7, When itis desired toinsert a fuse in the the .pin of the stick is then insertedin the terminals the pin 42 is first placed in the eye eye 7 nd the fuse1 is swung upwardly. In 10 and the trunnions 18 are then forced beh sSwi ging! upwardlv the lower edge 57 tween the spring pressed jaws 20and 19. 0f the ring 9 engages the cross bar 50, forc- I The pin 42 ithen withdraw from th y ing the same downwardly until the spring i0 andis inserted in theeye 7 and the fuse is WIl n th pposite side of center,

1 is swung upwardly and the upper ferrule whereupon the movable jaw 46Wlll be 3 is pushed between the spring jaws 30 and h n down upon thetrunnion 18. I

31 to bring 'the fuse into the position' hown It Wlll be noted that theshape of the end in Figure 1.

In Figures 6 and 7 I have illustrated a to Wedge the trunnion 18 betweenthe pormodified form in which the spring jaws are tion 49 of thestationaryj aw and the edge caused to open automatically when the fuse 1end Surfa e 58 of the movable jaw 46.

is swung to the inverted position and to The continued rotation of thetrunnion 18 close automatically when it is swung to the tends further tobindthese'parts closely tonormal position. Th fus 1 and th er gether sothat very intimate contact is se- "terminal are of substantially theconstruccured.

tion above described. The spring pressed In Figure 8 I have shown afurther modi- 'jaws 46 and 47 are pivoted together with fication'inwhich the fuse 1 is constructed the springs 48 arranged to snap themovable at its upper and substantially as previously jaw 46 open andshut in accordance with descrlbed, but the lower ferrule 60 is formedthe position of the fuse 1. The stationary of greater lengthin order toengage the jaw 47 is provided with an upwardly prospring terminal jaws61. The trunnions 18 ecting portion 49 which is adapted to hold aremounted in suitable brackets 62, which the trunnion 18 against outwardmotion have suitable bearing portions 63. The while the movable jaw 46is being snap ed brackets 62 and the spring jaws 61 are into or out ofholding position. The aw mounted upon a common base 64 which 46 isduplicated for both sides of the fuse forms the terminal for the lowerend of the and the two parts are connected together fuse.

evenly by a rod 50, or they may be cast in The operation of this form ofthe. device one piece with a bridge member between is apparent fromFigure 8. The fuse may them for insuring the joint operation of bewithdrawirby inserting the pin 42 in the both arms 46. The movable jawsand staeye 7 andthereby withdrawing the upper tionary jaws are pivotedtogether upon av ferrule 3 from contact with the spring aws shaft 51.The spring 48 is mounted between 3031. The lower ferrule 60 isthereafter suitable studs 52 and 53, the stud 53 being disconnected fromthe term nal 61 and the mounted in the stationary base portion 54 fuseis swung down to inverted position. and being substantially in line withthe The pin 42 may then be inserted in the eye shaft '51. The stud orprojection 52 is adapt- 10 and the fuse lifted so that the trunnions edto be swung from one side of center to come out of the socket portion63.

the other with,respect to the shaft 51 so that In each of the formsshown the fuse 1 is the operation of holding the jaws open orself-supporting and is provided at its lower shut may be automaticallyperformed by end with a trunnion or trunnions engaging swinging the fuseabout the trunnions 18. suitable bearing portions-the trunnions -be-When it is desired to withdraw the fuse, ing adapted to be inserted inthe stationary I the pin '42 is inserted in the eye 7 and the bearingsby means of the eye or lug secured switch which is necessary where a tothe adjacent end of the fuse. The other .end of the fuse is thenconnected by swinging the fuse about the trunnions by=means of an eye orlug fastened to the other end of the fuse.

The fuse shown is of the expulsion type and I have therefore providedthe finger 36 extendng above the top of the upper ferrule. In case of.blowing of the fusible wire the finger prevents upward movement of thefuse due to the recoil caused by the explosion. Y

The particular commercial utility of this device will be apparent fromthe above description. It will also beappreciated that the device shownand described serves as a combined fuse and d sconnecting switch,thereby eliminating the usual disconnecting fuse is employed.

I do not intend to be limited to the precise details of constructionshown and de scribed. I claim:

1. In combination, a fuse having a sleeve, a contact at one end of thesleeve, a lug projecting forward from said contact, a stationary springcontact member for engaging said contact, a trunnion member mounted onthe other end of the sleeve, a stationary bearing member for mountingthe trunnion and a lug on said sleeve projecting from the rear of saidtrunnion member.

2. In combination, a fuse having a sleeve, a contact at one end of thesleeve, a stationary spring contact member for engaging said contact, atrunnion member mounted on the other end of the sleeve, a stationarybearing member for mounting the trunnion and delivering current thereto,said stationary bearing member comprising a pair of spring pressedmembers for engaging the said trunnion member.v v

3. In combination, a pair of contact and terminal jaws, one of said jawsmoving vertically to receive a trunnion member, a fuse member having atrunnion member adapted to be engaged by said jaws, and a pair of:

terminal aws lying at right angles to the first pair of terminal jawsfor engaging the opposite end of the fuse.

4. In a device of the character described, a fuse having aself-supporting sleeve, a terminal member at one end thereof, a projection mechanically connected thereto, a trun nion member mounted on theopposite end of the sleeve, a support for said trunnion, and a secondprojection connected to said trunnion member for mounting and removingthe trunnion member on its support.

5. A fuse'comprising a sleeve of insulation, a ferrule mounted on theupper end of the sleeve, said ferrule beingprovided with means tosubstantially close the upper end thereof and having an integralpetticoat member at its lower end and a projection connected to saidpetticoat member. 1

6. In combination, spaced fixed supports, a combined connector and fusehaving one end open and the other closed, removably associated with saidsupports, the closed end of said fuse having a rigid end abutment withthe support associated therewith to take the end thrust when the fuse.blows and the openend being pivoted to permit the closed end to beswung out from under said end abutment.

7-. In a device of the class described, a rig'd sleeve having a ferrulemember secured thereto at each end and a eye member for each ferrulemember, said eye members lying on opposite sides of said sleeve and apivot between them.

8. In combination, a fuse having a trunnion member, a pair of jawscomprising a relatively stationary jaw and a relatively movable jaw, aspring for the relatively movable jaw, said jaw having means adapttomove said relatively movable jaw against said spring means to permitwithdrawal .of the trunnion member.

9. Ina combinedfuse and disconnecting switch, a fuse member havingpivotal mounting means at one end thereof, contactmeans at the oppositeend thereof, frictional engaging means for said contact means andyieldable. bearing means for mounting said pivotal means and to delivercurrent thereto, said bearing means being adapted to release thepivotal'means bodily.'

. ed to beengaged by the trunnion member 10. In a combined fuse anddisconnecting switch, a fuse member having pivotal mounting means at oneend thereof, contact means at the opposite end thereof, frictionalengaging means for said contact means, yieldable bear-ing means formounting said pivotal means, and an engaging eye at each end of saidfuse member for manipulating said fuse.

11. In a combined fuse and disconnecting switch, asleeve of insulation,metallic terminal members at each end of said sleeve,

a fusible link in said sleeve connecting said terminal members, pivotalmeans extending laterally from one terminal member, stagripping saidpivotal means, stationary contact means lying at substantially rightangles to the pivotal means for engaging theupper terminal member, andan eye'connected to each terminal member.

I 13. In combination, apair of spring jaws adapted to have a membermoving in a vertical plane inserted between them, a second pair of jawsadapted to have a horizontal bearing member gripped between 'them, and afuse having an upper terminal member adapted to engage the spring jawsand having a lower terminal member provided with a trunnion adapted tolie between the second pair of jaws.

14. In combination, a pair of jaws adapted to grip a member swinging inone plane," a second pair of jaws adapted to engage a rotary memberlying in a plane substantially at right angles to said first plane, afuse member having a terminal adapted to move in said first plane, andhaving a trunnion member and terminal having its axis at substantiallyright angles to said first plane, said trunnion member being engaged bysaid second pair ofjaws.

15. In combination, a pair of jaws, one" of said jaws being movable,sprlng means for moving said jaws either away from or towards thestationary jaw, a fuse having a terminal member comprising a trunnionadapted to be gripped between the stationary and the movable jaws, andhaving means for moving said movable jaw at the center with relation tosaid spring means in either direction upon rotation of the fuse aboutsaid trunnion member.

16. In combination, a fuse having a sleeve, a ferrule mounted on thelower end of the sleeve, said ferrule having a pivot for mounting thefuse and having a projection connected thereto for removal or insertionof the pivot of the fuse from or into its mounting.

17. In combination, a fuse having a sleeve, ferrules on each end of thesleeve, trunnions projecting laterally from one of said ferrules, jawmembers for yieldably gripping said trunnions, stationary contact meansfor engaging the other said ferrule, and a finger for engaging the upperend of said last mentioned ferrule lying above the stationary contact.

18. In combination, a fuse having a sleeve, contact members on each endof the sleeve, a stationary terminal member for engaging the upperoontact member, a pair of spring pressed jaw members forming theterminal for the lower contact member, pivotal means on the lowercontact member engaged by said spring pressed jaw members, and means onsaid pivotal means for opening the jaw members as the fuse is swung intolower position for removal.

19. In combination, a fuse having a sleeve, contact members on each endof the sleeve, one of said contact members being adapted to be engagedby a terminal member, the other of said contact members being adapted tohave pivotal spring pressed engagement with a second terminal member,and means for releasing said spring pressed engagement to permit removalof the fuse.

20. In combination, a fuse having a sleeve, contact members at each endof the sleeve, one of said contact members being adapted to be engagedby a terminal mem ber, the other of said contact members being adaptedto have pivotal spring pressed engagement with a second terminal member,means for releasing said spring pressed engagement as the said firstcontact member disengages its cooperatingterminal member, and meansadjacent said pivotal engagement for permitting removal and replacementof the fuse.

21. In combination, a removable fuse comprising a sleeve of insulationcarrying an upper contact member and a lower contact member each adaptedfor cooperation with stationary contacts, eyes secured to the contactsupon opposite sidesof the fuse whereby one contact must be -released andthe fuse swung about the other contact before the eye of the othercontact is accessible. i

22. In combination, a removable fuse comprising a sleeve of insulatingmaterial, an upper contact and a lower contact on the sleeve, stationaryterminals cooperating with the contacts, said lower terminal.com-

prising a bearing, the lower contact on thefuse having a pivotcooperating with said bearing, an eye lying in front of the uppercontact for separating the contact from its terminal and an eye lyingback of the lower contact for separating the pivot from said bearing.

23. In combination, a fuse having a trun nion, a terminal having abearing and an eye lying on the fuse adjacent the trunnion for removalof the trunnion from the bearing.

24. In combination, a fuse having upper and lower contacts, upperandlower terminals, one of said contacts comprising a pivot and thecooperating terminal comprising a bearing, said pivot and bearing beingreadily separable regardless of the angular position of the fuse.

25. In combination, spaced fixed terminals, a connecting elementpivotally and removably associated with one terminal at one end, andremovably associated at the other end with the other terminal, pullingmeans adjacent said last mentionedand accessible when the element is inoperative position, and pulling means adjacent'said one end, movedintoaccessible position by opening the circuit at the other end.

26. In combination, spaced? fixed terminals, a connecting elementremovably associated with both terminals, and two different prullingmeans for removing said element om the terminals, one pulling meansbeing relatively inaccessible when the element is in operative positionto compel removal of said element from a predetermined terminal first.

27. In combination, spaced fixed terminals, a connecting elementremovably associated with both terminals, and pulling means adjacenteach terminal, movement of said element into operative association withone terminal shifting the other pulling means into inaccessibleposition.

28. In combination, a combined fuse and switch connecting element, aswitch support having removable pivotal connection therewith anddelivering current thereto, and another terminal spaced from thissupport for engagement with the remote end of the fuse, removal of thefuse from the last mentioned terminal osi'tioning the fuse so as to bereadily li ted away from said support.

29. Ina combined fuse and disconnecting switch, a sleeve of insulation,metallic ter- '.minal members at each end of said sleeve,

a fusible link in said sleeve connecting said termlnal members, pivotalmeans extending laterally from one terminal member, statlonary mountingmeans recelvlng said piv- I otal means and permitting withdrawal thereofoutwardly, stationary contact means for engaging the other terminalmember, a pulling eye on the outer side of said last mentioned terminalmember, and a pulling eye on the inside of said first mentioned terruleat each end, and eyes connected to said ferrules on opposite sides' ofthe sleeve, 'one of the ferrules having means for mounting the samepivotally. v

33. In combination, stationary contacts comprising an upper slipcontact, a lower pivot contact, a fuse having an upper slip ferrule anda lower pivot ferrule, and an eye on the front side of the slip ferruleand an eye on the back side of the pivot ferrule.

34. In combination, stationary contacts comprising anupper slip contact,a lower pivot contact, a fuse having an upper slip ferrule and a lowerpivot ferrule, and an eye on the front side of the slip ferrule and aneye on the back side of the pivot. ferrule, and a stationary abutmentlying above the upper terminal in position tooverliethe upper end of theupper term'inal when the fuse is in place.

35. A, fuse having an upper slip ferrule anda lower pivot ferrule, aneye on the front side of the slip ferrule and an eye on the back side ofthe pivot ferrule.

36. The combination,stationary contacts,

a fuse member having a sleeve of insulation bearing ferrules at oppositeends, said ferrules and contacts having co-operating configurationcontrolling the position of the fuse, and eyes on the ferrules lying onopposite sides of the fuse in the plane of movement of the fuse into andout of the contacts.

In witness whereof I hereunto subscribe my name this 13 day of April, A.D. 1919.

- '-ERNE-ST H. JACOBS.

